– Lat/Long: 48.71° N 121.99° W
South Twin Sister Weather Forecast
Cascade Range · United StatesIssued: 10 pm Fri 25 Sep Local Time
Updates in:
Update imminent hr min s
Issued: 10 pm Fri 25 Sep Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–4 Weather SummaryLight rain (total 9mm), mostly falling on Fri night. Very mild (max 15°C on Sun afternoon, min 7°C on Fri night). Wind will be generally light. | Days 5–7 Weather SummaryModerate rain (total 12mm), heaviest on Tue night. Very mild (max 15°C on Thu afternoon, min 8°C on Tue night). Wind will be generally light. | |||||||||||||||
Saturday 26 | Sunday 27 | Monday 28 | Tuesday 29 | Wednesday 30 | ||||||||||||
night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  | |  |  | |  |  | |  |  |  |  | | | | |
mod. rain | rain shwrs | rain shwrs | cloudy | clear | clear | some clouds | some clouds | clear | light rain | cloudy | light rain | rain shwrs | clear | some clouds | some clouds | |
Cloud base (m) | 600 | 800 | 1700 | 6300 | 6050 | 5750 | 8050 | 3150 | 1750 | 1800 | 800 | 9150 | 750 | 8650 | ||
km/h | ||||||||||||||||
 |  |  |  |  |  | |||||||||||
 cm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
mm | 8 | 0.3 | 0.1 | — | — | — | — | — | — | 0.1 | — | 4 | 8 | — | — | — |
max °C | 8 | 9 | 12 | 9 | 13 | 15 | 10 | 12 | 15 | 12 | 13 | 13 | 12 | 11 | 14 | 10 |
min °C | 7 | 7 | 11 | 8 | 9 | 14 | 8 | 9 | 14 | 11 | 12 | 11 | 8 | 8 | 13 | 9 |
chill °C | 5 | 7 | 11 | 8 | 9 | 14 | 8 | 9 | 14 | 10 | 11 | 10 | 8 | 8 | 13 | 9 |
Freezing level m | 1600 | 1650 | 2200 | 2650 | 2550 | 2700 | 2650 | 2600 | 2700 | 3100 | 2850 | 2950 | 2450 | 2400 | 2750 | 2950 |
 | — | 6:58 | — | — | 7:01 | — | — | 7:01 | — | — | 7:03 | — | — | 7:05 | — | — |
 | — | — | 6:58 | — | — | 6:54 | — | — | 6:52 | — | — | 6:51 | — | — | 6:49 | — |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: Light rain (total 9mm), mostly falling on Fri night. Very mild (max 15°C on Sun afternoon, min 7°C on Fri night). Wind will be generally light.
South Twin Sister Weather (Days 3-6):
Moderate rain (total 12mm), heaviest on Tue night. Very mild (max 15°C on Thu afternoon, min 8°C on Tue night). Wind will be generally light.
This table gives the weather forecast for South Twin Sister at the specific elevation of 500 m. Our advanced weather models allow us to provide distinct weather forecasts for several elevations of South Twin Sister. To see the weather forecasts for the other elevations, use the tab navigation above the table. For a wider overview of the weather, consult the Weather Map of Washington.
| Weather Station | Temp. | Weather | Wind | Gusts | Cloud / Visibility |
|---|---|---|---|---|---|
 | |||||
Bellingham Airport | | ||||
SHIP4272 | |||||
SHIP7540 |
* NOTE: not all weather observatories update at the same frequency which is the reason why some locations may show data from stations that are further away than known closer ones.